基于熔盐介质的大开口槽式集热器光热性能分析  

Analysis of the optical-thermal performance of a large aperture parabolic trough collector based on molten salt medium

作　　者：郭睿燊 雷东强[2] 刘汉涛 Guo Ruishen;Lei Dongqiang;Liu Hantao(School of Energy and Power Engineering,North University of China,Shanxi Taiyuan,030051,China;Institute of Electrical Engineering of the Chinese Academy of Sciences,Beijing,100190,China)

机构地区：[1]中北大学能源动力工程学院,山西太原030051 [2]中国科学院电工研究所,北京100190

出　　处：《机械设计与制造工程》2024年第4期111-115,共5页Machine Design and Manufacturing Engineering

基　　金：国家重点研发计划(2019YFE0102000);太阳能利用技术山西省科技创新重点人才团队(202204051002023)。

摘　　要：建立了基于熔盐介质的槽式太阳能集热器的光学仿真模型和传热模型。经验证,传热介质出口温度与实际出口温度误差在±1%以内,周向能流密度误差在4.7%以内,表明所建模型准确性较高。分析了槽式集热器开口弦长、集热管直径、光学误差等对其光学性能的影响,以及法向直接辐照度、熔盐介质流速等对集热系统热性能的影响。结果表明,当开口弦长不变时,选择较大直径的集热管可以提高光学效率与截断因子,使系统热性能略有提高,而入射角和光学误差的增加会降低光学性能;增加法向直接辐照度或传热介质流速可以提高系统热效率。It establishes an optical simulation model and a heat transfer model for a parabolic trough solar collector based on a molten salt medium,and verifies that the error between the outlet temperature of the heat transfer medium and the actual outlet temperature is within ±1%,and the circumferential energy flux density is within 4.7%.The accuracy of the models built in the paper is relatively high.Additionally,the influence of the aperture of the parabolic trough collector,the diameter of the absorber tube,optical errors on optical performance,as well as the effects of normal direct irradiance,molten salt medium flow rate on thermal performance are analyzed.The results indicate that when the aperture remains constant,selecting a larger diameter for the absorber tube can improve optical efficiency and truncation factor,and slightly increase the thermal performance of the system,while an increase in incident angle and error will reduce optical performance.Increasing normal direct irradiance or medium flow rate can enhance system thermal efficiency.

关 键 词：太阳能 熔盐 槽式 光学性能 热性能 

分 类 号：O351.2[理学—流体力学]